Sony was the first company to release a dedicated E Ink ebook reader, the Sony Librie, back in 2004. Since then Sony has continued to remain one of the top brands of ebook readers in the world.
With the release of the new Reader Wi-Fi PRS-T1, Sony aims to recover lost ground to the Kindle and Nook ebook readers. They even discontinued their much-liked earlier generation Sony Pocket, Touch, and Daily Editions to focus solely on the new PRS-T1.
The latest Sony Reader released is the Reader Wi-Fi model PRS-T1, a 6-inch E Ink ebook reader with an infrared multi-touchscreen.
The PRS-T1 is a big change in direction for the Sony Reader brand.
It has a new design and user interface, not to mention a bunch of new features and an Android operating system. It comes in three colors, black, white, and red.
The PRS-650 is Sony's 6-inch reader, and while the name seems redundant at this point, it is called the Touch Edition.
It's a slimmed down version of the previous model, weighing about 25% less at just 7.5 ounces.
Aside from the new screen, other upgrades for the PRS-650 include 2GB of internal memory, improved battery life, faster page turns, and it comes with 12 dictionaries.
The PRS-350 is Sony's 5-inch reader, and unlike the previous Pocket Edition, this new model has a touchscreen for taking notes, dictionary lookup, adding highlights, and all around faster navigation.
Aside from the screen size, the main difference between the PRS-350 and the PRS-650 is the 350 does not have memory card slots and does not support audio files.
These earlier Sony Reader models still sell from some retailers and are usually priced quite low. Sometimes the Pocket Edition sells for as little as $99. It's still a decent starter ereader or backup, it just doesn't have a touchscreen or any advanced features.
The PRS-950, also known as the Daily Edition, is the only Sony Reader to come with Wi-Fi and 3G wireless.
In addition to free 3G wireless connectivity from AT&T, the PRS-950 comes with WiFi and a basic web browser for use with WiFi, but because of the wireless it is limited to the United States only.
Unfortunately Sony no longer makes or sells the PRS-950.
Sony PRS-950 Daily Edition Review »
The PRS-900 Daily Edition was released back in December of 2009 and was replaced by the new PRS-950 a year later.
The PRS-900 was available for purchase in the United States only, and was Sony's first wireless ebook reader.
The PRS-900 has free 3G wireless connectivity to Sony's Reader Store, a touchscreen, a 7.1-inch display, and can have digital newspapers automatically delivered to the Reader via wireless each morning, hence the name "Daily Edition".
The PRS-600 has a 6-inch touchscreen display for quick navigation and for taking freehand notes, highlighting text, using the built-in dictionary, and for zooming and panning while reading PDFs.
The one drawback is that the touch layer somewhat decreases the clarity of the text.
It also has a virtual keyboard for entering notes and searches. Notes can be referenced with bookmarks, and can be exported to a computer.
Dubbed the "Pocket Edition", the PRS-300 is a smaller non-touchscreen ebook reader with a minimum of features.
It measures 6.2" x 4.2" x 0.4" and weighs 7.76 ounces. The epaper screen measures 5-inches diagonally.
The Pocket Edition is small enough to fit in a purse or jacket pocket, and can hold about 350 ebooks.

By embracing the open standard EPUB format, Sony's ereaders can read encrypted ebooks from a number of online ebook retailers. Check our dedicated Sony eBook Page for a comprehensive listing of current content providers.

Click here to read about Sony's older ebook readers.
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